中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

19 records (took 0.03 seconds)

    Negative impedance circuit and corresponding device
    11.
    发明授权
    Negative impedance circuit and corresponding device 有权

    公开(公告)号：US11484910B2

    公开(公告)日：2022-11-01

    申请号：US16747197

    申请日：2020-01-20

    Applicant: STMicroelectronics S.r.l.

    Inventor： Andrea Barbieri ,  Aldo Vidoni

    IPC: H03H11/52 ,  B06B1/02 ,  B06B1/06 ,  H03F3/45

    Abstract: A negative impedance circuit includes: a differential circuit stage; a positive feedback path from an output of the differential circuit stage to a first input of the differential circuit stage; and a negative feedback path from the output of the differential circuit stage to a second input of the differential circuit stage. The negative feedback path includes a first transistor, and a unitary gain path from the output of the differential circuit stage to the second input of the differential circuit stage, the unitary gain path coupled to ground via a reference impedance. The positive feedback path includes a second transistor. The first and second transistors are coupled in a current mirror arrangement and have respective control electrodes configured to be driven by the output of the differential circuit stage, where the negative impedance circuit causes a negative impedance at the first input of the differential circuit stage.

    FBDDA amplifier and device including the FBDDA amplifier
    12.
    发明授权
    FBDDA amplifier and device including the FBDDA amplifier 有权

    公开(公告)号：US10243520B2

    公开(公告)日：2019-03-26

    申请号：US15790518

    申请日：2017-10-23

    Applicant: STMicroelectronics S.r.l.

    Inventor： Andrea Barbieri ,  Sergio Pernici

    IPC: H03F1/32 ,  H03F3/45 ,  H04R3/00 ,  H04R19/00 ,  H04R19/04

    Abstract: A fully balanced differential difference amplifier includes a first differential input stage that receives an input voltage and a second differential input stage that receives a common-mode voltage. A first resistive-degeneration group is coupled to the first differential input and a second resistive-degeneration group is coupled to the second differential input. A differential output stage generates an output voltage. A first switch is coupled in parallel to the first resistive-degeneration group and a second switch is coupled in parallel with the second resistive-degeneration group. The first and second switches are driven into the closed state when the voltage input assumes a first value such that said first input stage operates in the linear region, and are driven into the open state when the voltage input assumes a second value, higher than the first value, such that the first input stage operates in a non-linear region.

    Differential amplifier circuit for a capacitive acoustic transducer and corresponding capacitive acoustic transducer
    13.
    发明授权
    Differential amplifier circuit for a capacitive acoustic transducer and corresponding capacitive acoustic transducer 有权

    公开(公告)号：US10182292B2

    公开(公告)日：2019-01-15

    申请号：US15868480

    申请日：2018-01-11

    Applicant: STMicroelectronics S.r.l.

    Inventor： Germano Nicollini ,  Andrea Barbieri

    IPC: H04R3/00 ,  H03F3/45 ,  H04R19/04 ,  H04R19/00 ,  H03F3/181 ,  H03F3/187 ,  B06B1/02 ,  H04R29/00

    Abstract: An amplifier circuit, for a capacitive acoustic transducer defining a sensing capacitor that generates a sensing signal as a function of an acoustic signal, has a first input terminal and a second input terminal, which are coupled to the sensing capacitor and: a dummy capacitor, which has a capacitance corresponding to a capacitance at rest of the sensing capacitor and a first terminal connected to the first input terminal; a first amplifier, which is coupled at input to the second input terminal and defines a first differential output of the circuit; a second amplifier, which is coupled at input to a second terminal of the dummy capacitor and defines a second differential output of the circuit; and a feedback stage, which is coupled between the differential outputs and the first input terminal, for feeding back onto the first input terminal a feedback signal, which has an amplitude that is a function of the sensing signal and is in phase opposition with respect thereto.

    Differential-type MEMS acoustic transducer
    17.
    发明授权
    Differential-type MEMS acoustic transducer 有权

    公开(公告)号：US09961451B2

    公开(公告)日：2018-05-01

    申请号：US14858997

    申请日：2015-09-18

    Applicant: STMicroelectronics S.r.l.

    Inventor： Germano Nicollini ,  Silvia Adorno ,  Andrea Barbieri ,  Federica Barbieri ,  Sebastiano Conti ,  Edoardo Marino ,  Sergio Pernici

    IPC: H04R3/00 ,  H04R19/00 ,  H04R19/04 ,  H04R19/02 ,  H04R25/00

    CPC classification number: H04R19/005 ,  H04R19/02 ,  H04R19/04 ,  H04R2201/003 ,  H04R2499/11 ,  H04R2499/15

    Abstract: A MEMS acoustic transducer has: a detection structure, which generates an electrical detection quantity as a function of a detected acoustic signal; and an electronic interface circuit, which is operatively coupled to the detection structure and generates an electrical output quantity as a function of the electrical detection quantity. The detection structure has a first micromechanical structure of a capacitive type and a second micromechanical structure of a capacitive type, each including a membrane that faces and is capacitively coupled to a rigid electrode and defines a respective first detection capacitor and second detection capacitor; the electronic interface circuit defines an electrical connection in series of the first detection capacitor and second detection capacitor between a biasing line and a reference line, and further has a first single-output amplifier and a second single-output amplifier, which are coupled to a respective one of the first detection capacitor and the second detection capacitor and have a respective first output terminal and second output terminal, between which the electrical output quantity is present.

    Biasing circuit for a MEMS acoustic transducer with reduced start-up time
    18.
    发明授权
    Biasing circuit for a MEMS acoustic transducer with reduced start-up time 有权
    具有减少启动时间的MEMS声学换能器的偏置电路

    公开(公告)号：US09462395B2

    公开(公告)日：2016-10-04

    申请号：US14746252

    申请日：2015-06-22

    Applicant: STMICROELECTRONICS S.R.L.

    Inventor： Germano Nicollini ,  Andrea Barbieri ,  Federica Barbieri ,  Alberto Danioni ,  Edoardo Marino ,  Sergio Pernici

    IPC: H04R3/00 ,  H04R19/04

    CPC classification number: H04R19/04 ,  H04R3/00 ,  H04R2201/003

    Abstract: A MEMS acoustic transducer device has a capacitive microelectromechanical sensing structure and a biasing circuit. The biasing circuit includes a voltage-boosting circuit that supplies a boosted voltage on an output terminal, and a high-impedance insulating circuit element set between the output terminal and a terminal of the sensing structure, which defines a first high-impedance node associated with the insulating circuit element. The biasing circuit has: a pre-charge stage that generates a first pre-charge voltage on a first output thereof, as a function of, and distinct from, the boosted voltage; and a first switch element set between the first output and the first high-impedance node. The first switch element is operable for selectively connecting the first high-impedance node to the first output, during a phase of start-up of the biasing circuit, for biasing the first high-impedance node to the first pre-charge voltage.

    Abstract translation: MEMS声学换能器装置具有电容微机电感测结构和偏置电路。 偏置电路包括在输出端子上提供升压电压的升压电路和设置在感测结构的输出端子和端子之间的高阻抗绝缘电路元件，其限定与第一高阻抗节点相关联的第一高阻抗节点 绝缘电路元件。 偏置电路具有：预充电阶段，其在其第一输出上产生作为升压电压的函数并与其不同的第一预充电电压; 以及设置在第一输出和第一高阻抗节点之间的第一开关元件。 第一开关元件可操作用于在偏置电路的启动阶段期间选​​择性地将第一高阻抗节点连接到第一输出，以将第一高阻抗节点偏置到第一预充电电压。

    BIASING CIRCUIT FOR A MEMS ACOUSTIC TRANSDUCER WITH REDUCED START-UP TIME
    19.
    发明申请
    BIASING CIRCUIT FOR A MEMS ACOUSTIC TRANSDUCER WITH REDUCED START-UP TIME 有权
    具有降低启动时间的MEMS声学传感器的偏置电路

    公开(公告)号：US20160029129A1

    公开(公告)日：2016-01-28

    申请号：US14746252

    申请日：2015-06-22

    Applicant: STMICROELECTRONICS S.R.L.

    Inventor： Germano Nicollini ,  Andrea Barbieri ,  Federica Barbieri ,  Alberto Danioni ,  Edoardo Marino ,  Sergio Pernici

    IPC: H04R19/04

    CPC classification number: H04R19/04 ,  H04R3/00 ,  H04R2201/003

    Abstract: A MEMS acoustic transducer device has a capacitive microelectromechanical sensing structure and a biasing circuit. The biasing circuit includes a voltage-boosting circuit that supplies a boosted voltage on an output terminal, and a high-impedance insulating circuit element set between the output terminal and a terminal of the sensing structure, which defines a first high-impedance node associated with the insulating circuit element. The biasing circuit has: a pre-charge stage that generates a first pre-charge voltage on a first output thereof, as a function of, and distinct from, the boosted voltage; and a first switch element set between the first output and the first high-impedance node. The first switch element is operable for selectively connecting the first high-impedance node to the first output, during a phase of start-up of the biasing circuit, for biasing the first high-impedance node to the first pre-charge voltage.

    Abstract translation: MEMS声学换能器装置具有电容微机电感测结构和偏置电路。 偏置电路包括在输出端子上提供升压电压的升压电路和设置在感测结构的输出端子和端子之间的高阻抗绝缘电路元件，其限定与第一高阻抗节点相关联的第一高阻抗节点 绝缘电路元件。 偏置电路具有：预充电阶段，其在其第一输出上产生作为升压电压的函数并与其不同的第一预充电电压; 以及设置在第一输出和第一高阻抗节点之间的第一开关元件。 第一开关元件可操作用于在偏置电路的启动阶段期间选​​择性地将第一高阻抗节点连接到第一输出，以将第一高阻抗节点偏置到第一预充电电压。

Patent Agency Ranking